Self-answering signal system.



B. 4R. GILL. SELF ANSWBRlNG SIGNAL' SYSTEMl APPLIATIbN FILED JAN. 13, 1909;

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51 i [Tom/tmf l HBD .STATE PATENT-OFFICE, A

or. YoNKERs, NEW YORK, -AssIeNoR To UNITED STATES 'ELECTRIC @Oumar AconPonAmIoNonwnsrVIRGINIA.

i' SELF-ANSWERING'SIGNEL SYSTEM,

Specification of-Lettersllatent. I

piii'ieation ieiimiuary is, 1909. -'serial N0.` @ranzav f l concern: n

fof the' United stateS-, 'residing inthe .of ;Y onkers',",county of Westchester, and 3f-alteof.NeW York, have invented. acertain iowand useful- Improvement in Self-Anyjve'riiig Signal Systems, of which the fol- J'win'g'isgspeci'cation. present invention .has relation` to a Simple formfofyanswer back, whereby on circuit at av distance by y means v'fjtho mainfcircuit, the operator 'may in- ;jitantlyappris'ed of the successful operation ffthecireuit closer.- it Thisjinventionis intended principally for isc; 'in 'connection' with telegraph-ic and telephonic ocal circuit isi-.closed` electromagnetically w1tliout'- .ther use of selective mechanism or Where 'selective vdevices are employed for op- Seratingone signal alone of.. a .considerable number.v

'signals andmay be used either Where IQ vave 'shown my improvement in three illustrative'modifications in the accompany- 5 5 in'g'drawing's each of tl'ie three figures Aof Whichisa diagram showing one 'form ofthe l1v'ei`it' ion. p, 4" InjF-iguia'el the main line over which'the signals are operated is'in'dicated at 10, and atv'llz is'indica'ted the base of any desired form of selectivecircuit closer operated by an electromagnet shown in diagram .at 12. lMy invention is not 'concerned with tlliedc` tails in this selective device, many forms of 35 which'are well known; and, while thev form shown/in my lPatent No. 906,523, dated DeiceinberA 15th 1908, is suitable for this purpoSe,I ani not limited to use of this type'of device. .In Fig. '1: the vcircuit closer or 0. switch', whereby-thelOcal'Sig'nal circuit is -established, is indicatedin diagram at 13. This is operated by means controlled by theV magnetlQ. The 'signa-l in 'tlieforni shown is an ordi- .45 nary bell 14, in series with a local battery- 15, with -tlieswitch 13, and with a lcoil 16, on the' magnet 12. The local circuit'coil on the magnetis distinguished from the operating circuiti 17 connectedfwiththe main line by 5o the and l'ghtlines for the latter.

In some ciseslit may be found advan,

use oflieavylines to indicate the former 'tageous to 'place a react-ion or choke coil'lS,

on one oi both sides of the local operating switch circuit, 4tor the purpose of arresting' rapidly I nidulating' 'or oscillating currents such as those on telephone circuits and those due to lightning.

* i' The operation of the answeil back depends upon the inductivectled of tlieundulatory or interrupted -currentset up in the local sign'alcircu-it by Adirectaction of the interfrupte'r forming part ol the signal as well as :patented bythe ".kiclt bark i ofits'niagnet. This current, passing through the coils 16 vwhich act as a primary, while the magnet itself acts as' a converter -coi'e,'set up by induction a corresponding'alternating curn-:ntiiiA the main line, which can be distinctly perceived by means of a telephone lil, or other device seusitive to these currents. -l'Yliere' the choke coils 18 are used they should be Aso proper` tioned as to'allow pzi'ssage ot' the relativelyr slow uud-ulations produced as above -dc sci'ibed .wliile at tlie'saine time preventing passage o1 such relatively highui'idulations as are produced' in telephone circuits by talking. orv as' are' produced by lightning. Thus as long 'as the switch 13 remains closed, the buzzing will be heard at 1S), whereby the operator knows that he has been successful.

In Fig, is shown an arrangement. for use where aiiui'nber ot' signals are arranged in series on :i sing'lewirc 20. ln this caso thenon-inductive resistance 21 may, or may -n ot be used in shunt with the magnet circiii-t 17.

ln Fig. 3 1s shown a single magnet' 2Q,

adapted, when energized, to draw tof-it .the

armature 2310 close thes'igna'l 'circuit' at 13. The same principle ot .answering"'backby induction from the coil 16 on the operating magnet embodied here 4as in -the other forms shown.

"1.- A self fanswe'ring signal system coinprising-.a main line. an electro-magnet having coils; connected to said ni-ain line, an electromagnetic signal device, an. electric-circuit for said sign-al device including one 'or more coilson said first named' electro-magnet, and -a circuit changerfor said last named circuit,

arranged to beoperated by energizing said magnet,l substantially as described.

i 2. A self-answering signa] system comcir'cuit changer for said las't risinifd circuit', prising a main lii1e,-a selective signal operator having an' operating/'electrofnmgnct whose coils are connected to said-'main line,

l i signal operutgr, sfu

- 5 an electro-magnetic signal device, n electric stavntially as described n EDWIN R. GILL.

Witnesses:

vH, S. MAGIQUE, 1 Mi Al-*BUTLER circuit for' sald signal device including one m' more coils on sind electro-magnet, :india arranged to be OE'eratedby said slective' 

